Streaming light propagation

摘要

A method is provided for streaming light propagation with particular application for feature films and other demanding content creation using scenes of high complexity requiring art directed global illumination. By attaching a data recording shader or equivalent functionality to any tracing based renderer that can provide multi-pass global illumination, the complete set of light bounce propagation records and the set of emissive samples for a particular rendering can be recorded to memory or disk. A user may edit the emissive samples to adjust the lighting environment, including modifying light source color and intensity and even moving and adding new emissive samples. To relight the scene, the edited emissive samples are processed through the propagation records using a streaming multiply-and-add operation amenable to high levels of parallelization, avoiding a costly re-rendering of the scene and providing a final quality result in interactive time.

主权项

1. A computing device for providing streaming light propagation, the computing device comprising:
a processor configured to:
record a plurality of light propagation records in the scene;determine a plurality of light emission samples in the scene;edit the plurality of light emission samples by changing at least one of light intensity and red, green, blue (RGB) color values to provide a plurality of edited light emission samples;generate an output image by propagating the plurality of edited light emission Samples through the plurality of light propagation records, wherein the plurality of light propagation records each includes a source point and a destination point associated with emissive and radiance samples in the scene.